기저질환이 없는 사람에서 발생한 Campylobacter fetus에 의한 재발성 심내막염 1예

전재범,정진원,김성혜,송문희,오형철,안성기,최상호,김남중,김양수,우준희,류지소 대한감염학회 2004 감염과 화학요법 Vol.36 No.6

C. fetus 심내막염은 드물게 발생하는 질환으로 주로 면역능이 저하된 환자에서 발병하고 대동맥판을 침범하는 경우가 많으며 적절한 치료가 되지 않을 경우 치사율이 높다. 저자들은 기저질환이 없던 69세 남자에서 C. fetus 심내막염을 경험하였기에 문헌고찰과 함께 보고하는 바이다. 환자는 발열로 내원하여 시행한 혈액배양 검사상 C. fetus가 동정되었고 경식도 초음파 검사상 삼첨판에 증식증이 발견되어 심내막염 진단하에 ceftriaxone에 이어 meropenem으로 총 4주간 항생제를 투여받고 호전되었다가 한달 후 다시 재발하였고 판막부전 소견 진행하여 삼첨판 치환술을 시행받고 전신상태 호전되어 퇴원하였다. Campylobacter fetus is a rare cause of endocarditis. To date, only about 30 cases of C. fetus endocarditis have been reported mainly in the elderly with chronic underlying illnesses. Most cases showed tendency to involve aortic valve. This report describes a case of native tricuspid valve infective endocarditis in a 69-year-old man without any underlying disease. Despite adequate antibiotic therapy for 4-weeks, endocarditis recurred and leading to surgical valve replacement.

한국인 직무 스트레스 측정도구의 개발 및 표준화

장세진,고상백,강동묵,김성아,강명근,이철갑,정진주,조정진,손미아,채창호,김정원,김정일,김형수,노상철,박재범,우종민,김수영,김정연,하미나,박정선,이경용,김형렬,공정옥,김인아,김정수,박준호,현숙정,손동국 大韓産業醫學會 2005 대한직업환경의학회지 Vol.17 No.4

Background and Purposes: Over the past three decades, numerous studies performed in Korea have reported that job stress is a determinant risk factor for chronic diseases and work disability. Every society has its own culture and occupational climate particular to their organizations, and hence experiences different occupational stress. An occupational stress measurement tool therefore needs to be developed to estimate it objectively. The purpose of this study is to develop and standardize the Korean Occupational Stress Scale (KOSS) which is considered to be unique and specific occupational stressors in Korean employees. Subjects and Methods: Data were obtained from the National Study for Development and Standardization of Occupational Stress (NSDSOS Project: 2002-2004). A total of 12,631 employees from a nationwide sample proportional to the Korean Standard Industrial Classification and the Korean Standard Occupational Classification were administered. The KOSS was developed for 2 years (2002-2004). In the first year, we collected 255 items from the most popular job stress measurement tools such as JCQ, ERI, NIOSH and OSI, and 44 items derived from the a qualitative study (depth interview). Forty-three items of KOSS, in the second year, were retained for use in the final version of the KOSS by using Delphi and factor analysis. Items were scored using conventional 1-2-3-4 Likert scores for the response categories. Results: We developed eight subscales by using factor analysis and validation process: physical environment (3 items), job demand (8 items), insufficient job control (5 items), interpersonal conflict (4 items), job insecurity (6 items), organizational system (7 items), lack of reward (6 items), and occupational climate (4 items). Together they explained 50.0% of total variance. Internal consistency alpha scores were ranged from 0.51 to 0.82. Twenty-four items of the short form of the KOSS (KOSS-SF) were also developed to estimate job stress in the work setting. Because the levels of the subscales of occupational stress were gender dependent, gender-specific standard norms for both the 43-item full version and the 24-item short form using a quartile for the subscales of KOSS were presented. Conclusion: The results of this study suggest that KOSS might be an appropriate measurement scale to estimate occupational stress of Korean employees. Further and more detailed study needs to be conducted to improve the validity of this scale.

압출기 유압펌프의 압력제어

김교형,이준홍 嶺南大學校 工業技術硏究所 2001 工業技術硏究所論文集 Vol.29 No.2

Pressure control of hydraulic pump in aluminum extrusion is adjusted by hand to get the optimum extrusion velocity Manual control of the extrusion velocity degrades the qualify of the surface due to the unevenness control of hydraulic pressure. In this study pressure control of hydraulic pump is simulated with fuzzy memory rule for aluminum process. Pressure response of the system has shown good results.

자궁탈의 임상적 고찰

김동원,노형균,안태규,최상준,송창훈,정혁 조선대학교 부설 의학연구소 1999 The Medical Journal of Chosun University Vol.24 No.1

The purpose of this study was to evaluate clinical aspects of prolape uteri. This clinical and statistical study was attempted to analyze 369 cases of uterine prolapse(328 cases -operated, the other cases - not operated) from Jan. 1994 to Dec. 1998 at the Department of Obstetrics and Gynecology, Chosun University Hospital. The results were as follows. 1. The incidences of uterine prolapse was 0.62% of the total admitted gynecologic patients during the study period. 2. Age distribution at the time of operation showed that 184 cases(25.6%) were 60 to 65 years of age, and 62 cases(18.2%) were 56 to 60 years of age. 3. Age distribution at the time of development of prolapse uteri showed that 134 cases(36.3%) were 21 to 30 years of age, 126 cases(34.1%) were 31 to 40 years of age. 4. 228 cases(61.7%) were those who had suffered from uterine prolapse for more 11 years and the mean durations were 15.6 years. 5. The degree of prolapse uteri showed that 281 cases(76.1%) were 3rd degree and 61 cases(16.5%) were 2nd degree. 6. The parity showed that 297 cases(80.2%) were over 4 times and 2 cases(0.27%) was nullipara. 7. The delivery place was at home in 318 cases(86.1%) and in hospital in 51 cases(13.9%). 8. The main symptoms comprised prolapse in 311 cases(84.2%), urinary frequency in 259 cases(70.1%), and bearing down sensation in 242 cases (65.8%). 9. An operation in 328 cases was carried out of 369 cases of prolapse uteri, 301 cases were treated by the vaginal hysterectomy with either anterior &osterior repair or posterior repair, 23 cases were treated by anterior &osterior repair. 10. The postoperative complications were urinary tract infection in 7 cases(2.1%), urinary retention in 4 cases(1.2%), vaginal vault prolapse in 2 cases(0.6%). 11. The indwelling foley catheter was kept for 7 days in 279 cases and the average postoperative hospitalization was around 9 days. 12. The postoperative pathologic findings were chronic cervicitis in 211 cases(67.8%), squamous metaplasia of the cervical gland in 98 cases(31.5%), adenomyosis in 69 cases, leiomyoma in 47 cases, and dysplasia of cervix, cervical polyp, endometrial polyp were also resulted. In conclusion, clinical features of uterine prolapse were studied. The clinical evaluation of uterine prolapse include age, parity, degree of prolapse, delivery site, age of onset, symptomatology, type of operation, complications, the results of histopathological examinations. Further study is necessary before these aspects can be implicated in the clinical evaluation of uterine prolapse.

Descriptor 시스템 모델링 및 극배치 제어기 설계

김정주,이준형,강진식 濟州大學校工科大學産業技術硏究所 1999 尖端技術硏究所論文集 Vol.10 No.1

Many of the engineering systems such as electrical circuits, communication networks, power systems, aerospace systems and singular systems can be modelled by a descriptor system which is similar to the state space representation of the system. In this paper, we present a control algorithm for the descriptor system by using eigenstructare assignment. When the number of poles of the system changed due to the parameters variation, the system can be modelled by two subsystems as the one is static system and the other is dynamic. And two systems are connected serially by the manner that the one system output is connected to the input of the other system. The controller presented in this paper, designed by eigenstructure assignment, can treats such a singular system easily. To show the suggested controller has a good feature, we apply the presented controller to the inverted pendulum system.

하이드라진에 대한 물리화학적 특성과 분해 특성 조사

김상대,안현경,윤형준,이인형 순천향대학교 부설 산업기술연구소 2004 순천향 산업기술연구소논문집 Vol.10 No.2

Hydrazine is a weak base and strong reducing agent in the aqueous solution and is primarily utilized as a high-energy rocket propellant and an oxygen scavenger in boiler or feedwater. The objective of this study was to investigate the physicochemical properties and reactions of hydrazine and the catalytic and thermal decomposition by the emperature change. Hydrazine was fast decomposed with the of lower activation energy and at the higher temperature.

Descriptor 시스템 모델링 밍 극배치 제어기 설계

김정주,이준형,강진식 濟州大學校 産業技術硏究所 1999 산업기술연구소논문집 Vol.10 No.1

Many of the engineering systems such a s electrical circuits. communication networks. power systems, aerospace systems and singular systems can be modelled by a descriptor system which is similar to the state space representation of the system. In this paper, we present a control algorithm for the descriptor system by using eigenstructxe assignment. When the number of poles of the system changed due to the parameters variation, the system can be modelled by two subsystems a s the one is static system and the other is dynamic. And two systems are connected serially by the manner that the one system output is connected to the input of the other system. The controller presented in this paper, designed by eigenstructure assignment, can treats such a singular system easily. To show the suggested controller has a good feature, we apply the presenied controller to the inverted pendulum system.

풍경식 정원과 근대적 공간인식 형성에 관한 연구

김형준 제주대학교 공과대학 첨단기술연구소 2005 尖端技術硏究所論文集 Vol.16 No.2

This study is to look into the spatial cognition of modern space in the nineteenth century and it is on the purpose of understanding the character of the modern architectural space and of showing the modern architectural space connected with modern society and its everyday life. Especially, for understanding the spatial cognition of modern space, the Landscape Gardens will be analyzed. The reason for analyzing is that the Landscape Gardens are important theme in the nineteenth century and have great influence on whole European architecture and city. The Landscape Garden produce several modern spaces, that are 1) space of dynamic vision, 2) space of panorama, 3) space of spectacle. These spaces make modern cognition of space and pervade the space of everyday life in the nineteenth century. As a result, the modern spaces and their cognitions are in deep relation to modern society and its everyday life, and unique characters of that spaces are origin of the modern architecture and its space. A study on the effectiveness and convergency of damage measures for structural damage detection using the nonlinear parametric projection filter algorithm is presented in this paper. Damage measures are associated with the change in mode shape and displacement due to structural damage. So, five damage measures are presented in this paper. They are static displacement, curvature of static displacement, natural frequency, mode shape and curvature of mode shape. The static data are obtained by loading static load to the structure. And modal and dynamic data of a vibrating structure can be gained without dismantling the structure, these data are very useful in various aspects. But the results of detection are affected by the kind of damage measures to be used. The effectiveness and convergency of these damage measures on the structural damage detection using the nonlinear parametric projection filtering algorithm are demonstrated with the numerical examples.

사이클로이드 감속기구의 역전 방지에 관한 연구

김형준 서울産業大學校 2000 논문집 Vol.51 No.1

The overcentrode cycloidal gearing system has found application in planetary gear trains with difference of number of pinion gear teeth equal to one. This system is used in various application because of its compact size, less backlash, and high efficiency. But the manufacturing of the tooth profile of equidistant curve of epicycloid requires special machining technique. The use of special tooth profile such as trapezoid shape in the cycloidal gearing system makes possible mass production with the fine-blanking press technology. This gearing system with the simple tooth profile requires self-locking for its application, for example automobile seat back control system. This study finds the self-locking conditions and the transmission efficiency of the cycloidal gearing system with the trapezoid shape tooth profile by kinematic analysis and static force analysis.

아산지역 PC방에서의 금연석과 흡연석의 공기질 차이

김준형 외 순천향대학교 기초과학연구소 2011 순천향자연과학연구 논문집 Vol.17 No.1

This study seeks to differentiate between the air quality of the smoking area and the non-smoking area in internet cafes(or PC rooms in Korean slang) through the analysis of internet cafes around universities located in Asan-si. VOCs, HCHO, CO₂, and CO content of each area were analyzed. According to our observations, the HCHO content in the smoking area was 74.26ppm, 124.26ppm for TVOC, 688.58ppm for CO₂, and 2.80ppm for CO. On the contrary, in the non-smoking area, the HCHO content was 55.49ppm, 82.86ppm for TVOC, 606.18ppm for CO₂, and 2.32ppm for CO. This shows that the air quality between non-smoking and the smoking area do not have significant difference. As people are exposed and thus more interested about indoor air pollution, there are measures taken to clean the air indoors, but there are no relevant measures taken for internet cafes. Therefore, there should be measures taken in order to control ETS content, thought to be one of the main pollutants of internet cafe air quality, through various measures such as upgraded ventilation.